Renewable Toner MICR Okidata 43502001 MICR Toner Cartridge for Check Printing (High Yield: 7,000) Compatible with Oki Laser Printers: B4550, B4550n, B4600, B4600n Lifetime warranty. We only guarantee products ordered directly from Renewable Toner Replaces OEM Part #: Okidata 43502001 Contains magnetic toner for printing checks Yield: 7,000 Standard Pages | prints 21k checks @ 3 per page Compatible Oki Laserjet Printers: B4550, B4550n, B4600, B4600n, B4600n PS